CVE-2025-6227
Low
Description
Mattermost versions 10.5.x <= 10.5.7, 9.11.x <= 9.11.16 fail to negotiate a new token when accepting the invite which allows a user that intercepts both invite and password to send synchronization payloads to the server that originally created the invite via the REST API.
SeverityLow
CVSS2.2
Exploit probability—
Product
Mattermost Server
PublishedJul 18, 2025
First seenJul 18, 2025
Weakness typeCWE-522CWE-522
How to fix
Update
- mattermost mattermost_server9.11.17, 10.5.8 or later
- github.com/mattermost/mattermost-server10.5.8, 9.11.17, 9.11.17+incompatible, 10.5.8+incompatible or later
- github.com/mattermost/mattermost/server/v88.0.0-20250612074655-8f8612c63783 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 9.11.0 ≤ v < 9.11.17, 10.5.0 ≤ v < 10.5.8 | 9.11.17, 10.5.8 |
| github.com/mattermost/mattermost-serverGo | 10.5.0 ≤ v < 10.5.8, 9.11.0 ≤ v < 9.11.17, 9.11.0+incompatible ≤ v < 9.11.17+incompatible, 10.5.0+incompatible ≤ v < 10.5.8+incompatible | 10.5.8, 9.11.17, 9.11.17+incompatible, 10.5.8+incompatible |
| github.com/mattermost/mattermost/server/v8Go | v < 8.0.0-20250612074655-8f8612c63783 | 8.0.0-20250612074655-8f8612c63783 |
| github.com/mattermost/mattermost-server/v5Go | No range specified | — |
| github.com/mattermost/mattermost-server/v6Go | No range specified | — |
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